This building (no. 31) owes its name to its 14th-century owners, the Knights Hospitaller of Saint John of Jerusalem. For a bit of history, in 1191, Henry II known as the Blind, Count of Namur and Luxembourg, donated his fief of Hargimont to the Templars so they could establish a house of their Order there, hoping to obtain "the remission of his sins and the rest of the soul of his predecessors." This commandery, primarily dedicated to livestock breeding, would, like all Templar commanderies, pass to the Order of the Hospitallers of Saint John of Jerusalem (future Order of Malta) by a papal bull in 1312. Abolished in 1797 under the French revolutionary regime, the commandery was transformed into a farm. The building currently visible, superbly renovated into housing between 1999 and 2002, was constructed on the site of the former commandery in the second half of the 18th century.

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